This piece is unusual in concentrating all the elements of a symphony into a single movement; in being written for 15 solo instruments; in using chords built up of fourths; and in creating dissonances without immediate resolution. To its first audiences, the symphony seemed shocking. But today it is one of Schoenberg's most pleasing and accessible works. Scored for a chamber ensemble of flute, oboe, English horn, two clarinets, bass clarinet, bassoon, contrabassoon, two horns, two violins, viola, cello, and bass. Instrumentation. Glossary.